Stroke sensor and saddle riding type vehicle

Abstract

A stroke sensor includes a cover that covers a slide end on a protrusion side of a shaft in a slide region between the shaft and a housing while allowing a relative movement between the shaft and the housing, wherein a flange surface the extends radially outward from the slide end is provided on the housing, an axial direction seal that is in close contact with the flange surface in the axial line direction is provided on the cover, and a fixation member that presses the axial direction seal to be in contact with the flange surface is further provided.

The invention claimed is: 
     
       1. A stroke sensor comprising:
 a shaft that extends in a direction along an axial line; 
 a housing that extends along the shaft, houses the shaft in a state where the shaft protrudes outside, and supports the shaft slidably in the direction along the axial line; 
 a detection part that detects a slide amount of the shaft; and 
 a cover that covers a slide end on a protrusion side of the shaft in a slide region between the shaft and the housing while allowing a relative movement between the shaft and the housing, wherein 
 a flange surface that extends radially outward from the slide end is provided on the housing, 
 an axial direction seal that is in close contact with the flange surface in the direction along the axial line is provided on the cover, 
 a fixation member that presses the axial direction seal to be in contact with the flange surface is further provided, 
 a protrusion wall that protrudes outward in the direction along the axial line from an outer circumferential part of the flange surface is provided on the housing, and 
 the fixation member has a bowl shape and includes a circumferential wall that is fitted to the protrusion wall and a bottom wall that continues to the circumferential wall and that presses the axial direction seal to be in contact with the flange surface. 
 
     
     
       2. The stroke sensor according to  claim 1 , wherein
 a radial direction seal that is in close contact with the shaft in a radial direction is provided on the cover. 
 
     
     
       3. The stroke sensor according to  claim 1 , wherein
 an elastic protrusion part that protrudes toward the flange surface or the fixation member is provided on the axial direction seal. 
 
     
     
       4. The stroke sensor according to  claim 3 , wherein
 a recess part to which the elastic protrusion part is fitted is provided on the flange surface or the fixation member. 
 
     
     
       5. The stroke sensor according to  claim 3 , wherein
 the elastic protrusion part has an annular shape so as to surround the slide end when seen from the direction along the axial line. 
 
     
     
       6. The stroke sensor according to  claim 1 , wherein
 a rib that protrudes radially outward so as to be in close contact with the cover is provided on the shaft. 
 
     
     
       7. The stroke sensor according to  claim 1 , wherein
 a bending/stretching part that is capable of being bent and stretched when the shaft is slid is provided on the cover. 
 
     
     
       8. The stroke sensor according to  claim 7 , wherein
 the bending/stretching part includes one folding part. 
 
     
     
       9. The stroke sensor according to  claim 7 , wherein
 the bending/stretching part includes a plurality of folding parts that are aligned in the direction along the axial line. 
 
     
     
       10. The stroke sensor according to  claim 7 , wherein
 the cover includes an internal pressure adjusting part that adjusts an internal pressure by expanding or shrinking such that a volume of a space between the cover and the shaft is not changed when the bending/stretching part is bent or stretched in accordance with sliding of the shaft. 
 
     
     
       11. A saddle riding type vehicle comprising a stroke sensor according to  claim 1 .